Post Icons for WordPress – Plugin

I have just installed the plugins Category Icon and Post Icon which can be found here.

I have managed to get the Category Icon plugin to work, but don’t understand how to assign icons for individual posts. The isntructions provided don’t really clue me in:

– User can assign or icon to a post by assigning a value
to an ‘icon’ user (meta) post field.
– By using a ‘small_icon’ field, user can assign alternate plugin.
– A template tag (function) is exposed to include post icon into template.
– Alternatively if the post doesn’t have icon assigned, category icon may be used.

Can anyone help me with assigning post Icons? The developer of the plugin has turned off comments so I am unable to ask him.